I also keep blowing fuses, blower works fine and all of the buttons to change vents but I just get out side temp air. no heat or AC?:

You'll have to excuse me for my telepathic abilities seem to not be with me today.

Year and model????? I gather it is a Mercedes.

__________________
Ali Al-Chalabi

2001 CLK55
1999 Dodge Ram 2500 Cummins Diesel
2002 Harley-Davidson Fatboy
Merlin Extralight w/ Campy Record

sorry, just frustrated and in my own world. 1984 300SD, first noticed the blower not working replaced fuse, then the A/C no cold air, then no hot air and still blowing fuses but not as much lately.

The problem is most likely a worn out blower motor. Remove it and apply voltage directly to see if it will run. Use an inline fuse when you are jumping the voltage.

Good luck,